# Revision history [back]

The capital D is notation for the partial derivative; D[i] means partial derivative with respect to the ith variable of the function (where indexing starts at 0). So D[0](conjugate)(z) means take the partial derivative of the congugate function with respect to variable number 0 (i.e. z), and evaluate that derivative at z.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a ticket Trac #6344 which aims to change this notation, but it is now almost two years without an update.

The capital D is notation for the partial derivative; D[i] means partial derivative with respect to the ith variable of the function (where indexing starts at 0). So D[0](conjugate)(z) means take the partial derivative of the congugate function with respect to variable number 0 (i.e. z), and evaluate that derivative at z.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a ticket Trac #6344 6344 which aims to change this notation, but it is now almost two years without an update.

The capital D is notation for the partial derivative; D[i] means partial derivative with respect to the ith variable of the function (where indexing starts at 0). So D[0](conjugate)(z) means take the partial derivative of the congugate function with respect to variable number 0 (i.e. z), and evaluate that derivative at z.

This notation is not ideal, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a Trac ticket Trac 6344 which aims to change this notation, but it is now almost two years without an update.

The capital D is notation for the partial derivative; D[i] means partial derivative with respect to the ith variable of the function (where indexing starts at 0). So D[0](conjugate)(z) means take the partial derivative of the congugate function with respect to variable number 0 (i.e. z), and evaluate that derivative at z.

This notation is not ideal, universally loved, but was chosen deliberately after some long discussion. An explanation is given at this blog post. Note also that there is a Trac ticket 6344 which aims to change this notation, but it is now almost two years without an update.